EP3791372A1 - Système de détection auxiliaire portable - Google Patents

Système de détection auxiliaire portable

Info

Publication number
EP3791372A1
EP3791372A1 EP19726815.4A EP19726815A EP3791372A1 EP 3791372 A1 EP3791372 A1 EP 3791372A1 EP 19726815 A EP19726815 A EP 19726815A EP 3791372 A1 EP3791372 A1 EP 3791372A1
Authority
EP
European Patent Office
Prior art keywords
recited
light source
detector
detectors
light beam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19726815.4A
Other languages
German (de)
English (en)
Other versions
EP3791372B1 (fr
Inventor
David L. LINCOLN
Marcin Piech
Michael J. Birnkrant
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carrier Corp
Original Assignee
Carrier Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Carrier Corp filed Critical Carrier Corp
Publication of EP3791372A1 publication Critical patent/EP3791372A1/fr
Application granted granted Critical
Publication of EP3791372B1 publication Critical patent/EP3791372B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/02—Alarms for ensuring the safety of persons
    • G08B21/12—Alarms for ensuring the safety of persons responsive to undesired emission of substances, e.g. pollution alarms
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device
    • G08B17/107—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device for detecting light-scattering due to smoke
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/18—Prevention or correction of operating errors
    • G08B29/185—Signal analysis techniques for reducing or preventing false alarms or for enhancing the reliability of the system
    • G08B29/188—Data fusion; cooperative systems, e.g. voting among different detectors
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/10—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using wireless transmission systems
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/14—Central alarm receiver or annunciator arrangements

Definitions

  • a detection system includes a host detection system that has at least one primary hazard detector and a controller connected for communication with the at least one primary hazard detector, and at least one portable auxiliary hazard detector that can be temporarily introduced in a vicinity of the host detection system and link with the controller of the host detection system to provide additional detection capability.
  • the at least one portable auxiliary hazard detector has at least one light source. Each said light source, when operated, emits a light beam. At least one photosensor is operable to emit sensor signals responsive to interaction of the light beam with an analyte.
  • a further embodiment of any of the foregoing embodiments includes a surface plasmon sensor mounted on the circuit board and operable to emit second sensor signals responsive to interaction of the light beam with the surface plasmon sensor.
  • a further embodiment of any of the foregoing embodiments includes a waterproof casing enclosing the at least one light source and the at least one photosensor.
  • the at least one light source includes an ultraviolet light source and a visible light source, and further includes a wireless transmitter mounted on the circuit board and operable to transmit the sensor signals to the controller.
  • a method includes introducing a plurality of portable auxiliary hazard detector into a region and linking the portable auxiliary hazard detectors with a controller to provide detection capability in the region.
  • Each said portable auxiliary hazard detector has at least one light source.
  • Each said light source when operated, emits a light beam.
  • At least one photosensor is operable to emit sensor signals responsive to interaction of the light beam with an analyte, and determines whether a target species is present in the analyte based the sensor signals.
  • a further embodiment of any of the foregoing embodiments includes determining a chemical identity of the target species from a spectrum using the sensor signals of one of the detectors, and verifying the chemical identity by comparing the spectrum to another spectrum from the sensor signals of another of the detectors.
  • Detection systems in homes, office buildings, airports, sports venues, and the like identify smoke or chemicals for early warning of a threat event.
  • a system may have limited capability.
  • the system is limited to the capability of its existing detectors and although the system may continue to operate during a threat event, once the threat event is identified the system may have limited capability for enhanced analysis as the threat event unfolds.
  • Disclosed herein is a portable auxiliary detection system that can be added to a host detection system in order to augment detection capability prior to or during the threat event.
  • the system 20 includes a host detection system 24 that includes at least one primary hazard detector 26 (“detectors 26”) and a controller 28.
  • the controller 28 is communicatively connected for communication with the detectors 26 via connections 30. It is to be understood that communicative connections or communications herein can refer to optical connections, wire connections, wireless connections, or combinations thereof.
  • the controller 28 may include hardware (e.g., one or more microprocessors and memory), software, or both, that are configured (e.g., programmed) to carry out the functionalities described herein.
  • the detectors 26 may be, but are not limited to, smoke detectors or indoor air quality sensors that are capable of detecting small amounts of particulate (e.g., smoke particles, dust steam, or other particulate), chemicals, and/or biological agents in the analyte.
  • Example types of detectors 26 may include ionization detectors, photoelectric aspirating detectors, photoelectric chamber or chamber-less detectors, electrochemical sensors, surface plasmon resonance sensors, photoacoustic detectors, and combinations thereof.
  • the host detection system 24 is a permanent installation of the region 22. In this regard, at least portions of the detection system 24 may include hardware that is structurally integrated into the region 22.
  • the host detection system 24 is limited in that it contains a finite number of the detectors 26 that have established detection capabilities.
  • the detectors 26 may all be smoke detectors that are incapable of identifying chemicals or biological agents, or the detectors 26, after smoke is detected, may not provide further useful data.
  • the detectors 32 can be added to the host detector system 24 prior to any threat event, to augment detection analysis capability for indication of a threat event.
  • the detectors 32 may be used to temporarily boost capability, such as at a sporting event or other gathering of people, and the detectors 32 may afterwards be removed from the system 20 while the host detection system 24 continues operation.
  • the detectors 32 may be deployable as above, or alternatively used as a stand-alone detection system.
  • the detectors 32 are compact and portable, and are not hardwired to the controller 28.
  • the detectors 32 can easily carried by hand into the region 22 and temporarily placed in the region 22.
  • the“portable” nature of the detectors 32 refers to a detector 32 having greater portability than a detector 26.
  • the detector 26 is typically invasively mounted on a structure in the region 22, such as by a plurality of fastener screws and corresponding holes in the structure (a“destructive” installation that requires a permanent alteration to the structure of the region 22).
  • the detector 32 is non- invasively placed in the region 22 without any fastener screws or need for holes (a“non destructive” installation that does not require a permanent alteration to the structure of the region 22).
  • the detectors 32 may thus be freely moved and placed to operate from virtually anywhere in the region 22, i.e., unlike the detectors 26 the detectors 32 are not location-fixed in the region 22.
  • the detectors 32 Upon activation (e.g., powering or turning the devices ON) the detectors 32 link with the controller 28 of the host detection system 24 to provide detection capability in addition to the detectors 26, such as but not limited to, chemical detection, chemical identification, smoke detection, biological agent detection, and combinations thereof.
  • controller 28 may utilize data collected from the detectors 26, which will be described in further detail below.
  • Figure 2 illustrates a representative example of one of the detectors 32, which is also shown in a side view in Figure 3.
  • the detector 32 is on a Universal Serial Bus (USB) platform and includes a USB connector 33 and a circuit board 35.
  • the detector 32 may be a“plug and play” device that, once introduced into the vicinity of the host detection system 24 by plugging in (to power the detector 32), can be discovered by the host detection system 24 without the need for physical device configuration or user intervention.
  • Each light source 36 when operated, emits a light beam Bl ( Figure 3).
  • the detector 32 may further include a control module 40 and each light source 36 may be communicatively connected at 42 to the control module 40.
  • the control module 40 may include hardware (e.g., one or more microprocessors and memory), software, or both, that are configured (e.g., programmed) to carry out the functionalities described herein for the detector 32.
  • the control module 40 may be configured with the same communication protocol as the host detector system 24, such as but not limited to BACnet.
  • the control module 40 may also include a global positioning system (GPS) receiver, to enable the controller 28 to know the location of each detector 32. Additionally or alternatively, the controller 28 may utilize triangulation in a local area wireless network to locate each detector 32. As another alternative, the locations of the detectors 32 may be manually input into the controller 28.
  • GPS global positioning system
  • the light source 36 is communicatively connected with the control module 40 such that the control module 40 can control operation of the light source 36 with regard to OFF/ON, varying light intensity (power or energy density), varying light wavelength, and/or varying pulse frequency.
  • the light source 36 is a light emitting diode or laser that can emit a light beam at a wavelength or over a range of wavelengths that may be altered in a controlled manner.
  • the light intensity and/or pulse frequency can be varied in a controlled manner.
  • the control module 40 can scan the analyte across ranges of wavelengths, intensities, and/or pulse frequencies by controlling the light source 36.
  • one or more light sources 36 emits light in the wavelength range of 250 nm to 532 nm, 400 nm to 1100 nm or 900 nm to 25000 nm.
  • the wavelength range can be adjusted by a filter or a light source 36 can be chosen to generate light with a 100 nm or less spectral width that falls within the wavelength range.
  • the light source can also be controlled to generate multiple discrete wavelengths that are matched to the target species to improve sensitivity and selectivity.
  • “light” may refer to wavelengths in the visible spectrum, as well near infrared and near ultraviolet regions.
  • Each photosensor 38 is operable to emit sensor signals responsive to interaction of the light beam B 1 with the analyte, which here is represented at A.
  • the photosensor 38 may be a solid state sensor, such as but not limited to, photodiodes, bipolar phototransistors, photosensitive field-effect transistors, and the like.
  • the photosensor 38 is responsive to received scattered light Sl from interaction of the light beam B 1 with the analyte A.
  • the sensor signals are proportional to the intensity of the scattered light S 1 received by the photosensor 38.
  • the sensor signals may be saved in a memory in the control module 40 and/or transmitted via a transmitter 46 to the controller 28 of the host detection system 24.
  • the control module 40, the controller 28, both, or combinations of the control module 40 and the controller 28 may determine whether a hazardous material is present in the analyte based on an intensity of the scattered light. If the light source 36 is capable of scanning over a range of wavelengths, the control module 40, the controller 28, both, or combinations of the control module 40 and the controller 28 may also determine a chemical identity of the contaminant from a spectrum of the scattered light over the range of wavelengths. These two determinations may be referred to herein as, respectively, a presence determination and an identity determination ⁇
  • a presence determination can be made by analyzing the intensity of the sensor signals. For instance, when no material is present, the sensor signals are low. This may be considered to be a baseline or background signal. When a material is present and scatters light, the sensor signals increase in comparison to the baseline signal. Higher amounts of material produce more scattering and a proportional increase in the sensor signal. An increase that exceeds a predetermined threshold serves as an indication that the material is present.
  • the detector 32 also employs a low-power scheme.
  • the detectors 32 operate at a low sample rate. For instance, the sample rate may take one sample reading every 10-60 seconds. If one of the detectors 32 detects presence of a taregt species, the detector 32 may responsively begin sampling at a higher sample rate. An example high sample rate is one sampling per second. If that detector 32 still continues to detect the presence of the target species at the high sampling rate, it may send an alarm signal to the other detectors 32. The alarm signal triggers the other detectors 32 to go into the high sample rate, to help confirm the presence of the target species and provide information about where the target species is present. In one additional example, rather than all of the detectors 32 going into the high sample rate, only the nearest detectors 32 detectors go into a high sample rate such that at least one or two more remote detectors 32 do not go into the high sarnie rate.
  • the detectors 32 are used to increase sensitivity using data fusion. For instance, if one of the detectors 32 detects presence of a taregt species, but the concentration of the target species does not exceed an alarm threshold for an individual detector, that detector 32 may trigger other detectors, or at least nearby detectors 32, to go into the high sample rate. This, in turn, increases sensitivity through collection of more data from more detectors 32. Multiple detectors 32 then operating at the high sample rate may also detect the presence of the target species at a concentration that does not exceed the alarm threshold for an individual detector. The controller 28 monitors for this condition and, if it occurs, triggers an alarm.
  • Figure 4 illustrates another example portable auxiliary hazard detector 132.
  • the detector 132 includes an additional light source 136 communicatively connected at 142 with the control module 40 and an additional photosensor 138 communicatively connected at 144 to the control module 40.
  • the photosensor 138 may be a solid state sensor, such as but not limited to, photodiodes, bipolar phototransistors, photosensitive field-effect transistors, and the like.
  • the photosensor 138 is responsive to received forward-scattered light S2 from interaction of the light beam B2 with the analyte A.
  • the sensor signals are proportional to the intensity of the scattered light S2 received by the photosensor 138.
  • the photosensors 138 can also have wavelength dependence to only accept light at certain wavelength bands. This functionality may be built into the sensing elements of the photosensor 138, or alternatively a filter can be placed in front of the photosensor 138. For example, for fluoresce measurement, the light is emitted at wavelength range A, but the photosensor 138 may only detect light at wavelength range B, which may or may not overlap range A.
  • the sensor signals may be used to identify a fault condition in which there is an obstruction (e.g., a hand) in the lines of the light beams Bl, B2 that is not a hazardous material.
  • an obstruction e.g., a hand
  • such an obstruction may fully or nearly fully block forward-scatter to the photosensor 138 but produce scatter to the photosensor 38. This situation may be identified and trigger a fault condition in the control module 40, controller 28, or both, to ignore the reading as an obstruction instead of hazardous material.
  • FIG. 5 illustrates another example portable auxiliary hazard detector 232.
  • the detector 232 includes a beam splitter 50 and a surface plasmon sensor 52.
  • the beam splitter 50 is operable to split the light beam B 1 into first and second secondary light beams B3 and B4.
  • the first secondary light beam B3 is directed at the surface plasmon sensor 52 and the second light beam B4 is directed external to the detector 232.
  • the surface plasmon sensor 52 is communicatively connected at 54 to the control module 40 and is operable to emit sensor signals responsive to interaction of the light beam B3 with the surface plasmon sensor 52.
  • the photosensor 38 is responsive to received forward- scattered light Sl from interaction of the light beam B4 with the analyte A.
  • the metal film 58 is exposed to the analyte.
  • the light beam B3 enters the prism 56 through a second face 56b and propagates at an angle of incidence Rl toward the interface of the prism 56 with the metal film 58.
  • the light beam B3 reflects off of the interface at a resonance angle R2.
  • the light beam B3 excites surface plasmon polaritons in the metal film 58. If the analyte contains a hazardous material, the material interacts with the surface of the metal film 58, thereby locally changing the plasmon response and the resultant resonance angle R2.
  • the photosensor 60 is used to monitor the resonance angle R2 and emit the sensor signals to the control module 40.
  • surface plasmon resonance and devices are known and other types of surface plasmon sensors and techniques may be used.
  • the detectors 32 are used as a group to provide a two- prong detection strategy - one based on high concentration limits and another based on trending detection in the detectors 32.
  • the controller 28 triggers an alarm.
  • an alarm may be set from the sensor signals.
  • the intensities of the sensor signals are representative of the concentration of the target species in the region 22.
  • the controller 28 statistically aggregates the sensor signals and produces a distribution across all of the detectors 32.
  • An alarm level for high concentration may be set with regard to a mean value of the distribution (e.g., a multiple of the statistical standard deviation for the distribution).
  • a mean value of the distribution e.g., a multiple of the statistical standard deviation for the distribution.
  • the detection network of the detectors 32 may be used to identify whether an identified target species is moving or spreading. For instance, a cloud of a target species may envelop several of the detectors 32, but not others of the detectors 32.
  • the controller 28 identifies that at the instant time there is target species at some detectors 32 but not others. At a later time, the controller 28 identifies that, in addition to the same detectors 32 that identified the target species at the prior time, there are now additional detectors 32 that identify the target species. From this pattern, and especially (but not only) when the detectors 32 with new additional readings of target species are proximate to detectors 32 that at the prior time detected a target species, the controller 28 makes the determination that the target species is spreading.

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  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Engineering & Computer Science (AREA)
  • Emergency Management (AREA)
  • Toxicology (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Computer Security & Cryptography (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Fire Alarms (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

Un système de détection comprend un système de détection hôte qui a au moins un détecteur de danger principal et un dispositif de commande connecté pour une communication avec le ou les détecteurs de danger principal. Au moins un détecteur de danger auxiliaire portable peut être temporairement introduit à proximité du système de détection hôte et relié au dispositif de commande du système de détection hôte pour fournir une capacité de détection supplémentaire. Le détecteur de danger auxiliaire portable a au moins une source de lumière qui peut émettre un faisceau de lumière, et au moins un photocapteur qui a pour fonction d'émettre des signaux de capteur en réponse à l'interaction du faisceau de lumière avec un analyte.
EP19726815.4A 2018-05-11 2019-05-08 Système de détection auxiliaire portable Active EP3791372B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201862670217P 2018-05-11 2018-05-11
PCT/US2019/031265 WO2019217519A1 (fr) 2018-05-11 2019-05-08 Système de détection auxiliaire portable

Publications (2)

Publication Number Publication Date
EP3791372A1 true EP3791372A1 (fr) 2021-03-17
EP3791372B1 EP3791372B1 (fr) 2022-10-12

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ID=66655451

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19726815.4A Active EP3791372B1 (fr) 2018-05-11 2019-05-08 Système de détection auxiliaire portable

Country Status (6)

Country Link
US (1) US11830339B2 (fr)
EP (1) EP3791372B1 (fr)
JP (1) JP7414372B2 (fr)
CA (1) CA3099036A1 (fr)
ES (1) ES2928763T3 (fr)
WO (1) WO2019217519A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220148403A1 (en) * 2020-11-09 2022-05-12 Carrier Corporation Smoke detector sensitivity for building health monitoring

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Also Published As

Publication number Publication date
JP2021523505A (ja) 2021-09-02
JP7414372B2 (ja) 2024-01-16
ES2928763T3 (es) 2022-11-22
EP3791372B1 (fr) 2022-10-12
US20210248895A1 (en) 2021-08-12
WO2019217519A1 (fr) 2019-11-14
CA3099036A1 (fr) 2019-11-14
US11830339B2 (en) 2023-11-28

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